Embroidering machine



July 1, 1947. Q 7 2,423,092

- EMBROIDERING MACHINE Filed July 24, 1942 p JflCK LOU/6 FOGE L PatentedJuly 1, 1947 EMBROIDERING MACHINE Jack Louis Fogel, New York, N. Y.,assignor, by mesne assignments, to Manhattan Scalloping and EmbroideryWorks, Inc., New York, N. Y., a corporation of New York Application July24, 1942, Serial No. 452,153 In Canada May 22, 1942 15 Claims. 1

This invention relates to improvements in embroidering machines in whicha tensioned binding thread is wound around filler to form an ornamentalcord. In conventional machines of this type the tension under which thebinding thread is wound around the filler is maintained at a constantvalue and the cord produced is of uniform thickness or diameterthroughout its length.

The object of the present invention is to provide in an embroideringmachine of the type mentioned means for automatically valying thetensioning of the binding thread at regularly recurring intervals duringthe winding operation to thereby form an ornamental cord of varyingthicknesses or diameters throughout its length.

In the present instanc the invention Will be described as applied to thesewing head of a conventional type of embroidering machine which is wellknown to the trade as a Bonnaz L-type or Universal feed two or threethread cording machine such as the Singer 114W120. The invention is,however, capable of being applied to various other types of embroideringmachines which form an ornamental cord by winding a binding threadaround a filler. It is tobe understood that filler is used herein in thebroad sense of the word, and thus would include the needle or stitchingthread, as well as an additional thread used as a filler. The expressiontwo or three thread cording is descriptive of this.

Proceeding now to a more detailed description of this invention,reference will be had to the accompanying drawings in which:

Fig. 1 is a side elevational view of a portion of a sewing head assemblyembodying my invention.

Fig. 2 is a side elevational view of the component parts of the windingmechanism by means of which the binding thread is wound around thefiller.

Fig. 3 is a sectional view taken along the lines 3-3 of Fig. 2.

Fig. 4 is a bottom plan view of the parts shown in Fig. 3.

Fig. 5 is a view showing the cord as it appears when made in accordancewith the conventional method.

Fig. 6 is a view showing the cord as it appears when made in accordancewith my invention.

In these drawings I have shown only those component parts of aconventional Bonnaz L-type embroidering machine which are deemednecessary to an understanding of my invention. Such parts comprise atubular member 5, a filler tube 6, a needle 1, a sleeve 8, a collar 9, apinion l 0 and a binding thread feed spool l I. The member 5 and feedtube 6 are assembled in a conventional manner for unitary movement andare capable of both vertical and rotary movement with respect to thesleeve 8 which constitutes a stationary part of the sewing head. Therotary movement of the members 5 and 6 is in the nature of anoscillating movement which is efiected by manually operated mechanismwhich does not enter into the present invention and therefore is notdisclosed. The feed tube 6 is eccentrically disposed with reference tothe member 5 and encloses a portion of the needle 1 which isreciprocated in a conventional manner during the embroidering operation.

The collar 9 is secured to the pinion l0 and is rotated about the sleeve8 by means of a drive gear (not shown) engaging said pinion. The

binding thread feed spool l I is revolubly mounted between upper andlower arms l2 and I3, the arm l2 being fastened by a screw 16 to thehori- I zontal portion I5 of a conventional bracket l4 carried by thecollar 9. The arm I3 is fastened: to the arm 12 by a conventionaltensioning connection ll which is adjustable to move the arms [2 and I3towards or away from each other to thereby vary the tension controllingbraking pressure which these arms exert against the end flanges of thespool H.

The binding thread [8 wound on the spool H is led through guide openingsI9 and 28provided adjacent the upper and lower ends of a winding arm 22which is secured to the collar 9 by fastening means 23 and serves towind the binding thread around the filler thread 21 as the spool lowerflange so that the peripheral edge of the upper flange is eccentric tothe central axis of rotation of the spool. During part of each rotationof the spool about its axis braking pressure 1 is applied to theperipheral edge of the spool flange 28 by a spring pressed brake member40 provided with a flange receiving groove M. This brake member ispositioned so that it engages and acts against only that portion of theflange 28 which projects beyond the periphery of the lower flange.

The stem 34 of the brake member 40 is slidably arranged in the bore 33of a block 30. The block is recessed in the front end and is providedwith a curved extension bracket 31, the recess and the bracket beingshaped to fit about the collar 9. A bolt 32 projecting through thebracket 3| serves to fasten the block 35) to the collar. A coil spring35 fitted in the bore 33 and held in place by an adjustable screw plug36, engages the rear end face of the stem 34 and serves to yieldinglyresist retraction of the stem into the bore as the brake 49 engages theflange 28. The stem 34 is grooved as indicated at 3'! to receive a setscrew 38 which serves to guide the stem and to prevent rotarydisplacement. A stop 39 on the end of the stem acts against the screw 38to retain the stem in the bore 33. A relatively light coil spring 44arranged about the stem 34 engages between the brake 4-0 and the frontend of the block 30 to apply an initial tension to the flange '28.

During the winding operation of the binding thread around the filler,the thread is drawn off the spool under a predetermined constant tensionas arranged by the conventional tensioning connection l1. During a partof each revolution of the spool the projecting peripheral edge of theflange 28 is engaged by the brake member 40 which tends to yieldinglyresist rotation of the spool. In the initial engagement, the spring 44,exerting a relatively light resistance against retraction of the stem34, causes th'e brake 43 to gradually slow down the rotation of thespool. A slight stress is thereby placed on the binding thread duringthe winding operation about the filler and the binding thread Wraps moretightly about the filler in a gradual tapering manner as indicated at 45in Fig. 6. As the cam portion of the flange 28 forces the stem furtherinto the bore 33, the rear end of the stem contacts the spring 35 whichapplies a relatively strong resistance to the rotationv of the spool. Atthis stage the binding thread is bound around a portion of the fillerwith the maximum degree of tension so that this portion of the cord ismade of minimum thickness as indicated at 46. The spring 44 continues toexert its resistance on the waning side of the cam to produce an outwardtaper from the minimum to the maximum thickness of the cord as indicatedat 41 in Fig. 6.

While there has been shown and described but one simple embodiment ofthe present invention, it is, nevertheless to be understood that theessential mechanical features and the principle of operation might alsobe exemplified in other structural forms. Accordingly, the privilege isreserved of resorting to all such legitimat variations in form,construction and relative arrangement of the various parts as may fairlybe considered within the spirit and scope of the appended claims.

I claim:

1. An embroidering machine of the character described, comprising meansfor winding a binding thread around a filler to form an ornamental cord,and means including an eccentrically flanged spool from which saidbinding thread is fed, ,for automatically varying the tensiom'ng of saidbinding thread during the winding operation whereby the binding threadis wound more tightly around certain portions of the filler as comparedwith other portions thereof.

2. An embroidering machine of the character described including meansfor winding a binding thread around a filler and automatically varyingthe tensioning of the binding thread at regularly recurring intervalsduring the winding operation, said means comprising a spool from whichthe binding thread is fed, means mounting said spool for turningmovement about its central axis, means for moving said spool in acircular path around the filler, spool engaging means functioning toapply a constant braking pressure to said spool to yieldingly resistrotation of the spool about its axis and to thereby insure thmaintenance of a predetermined tension on the binding thread during thewinding of the thread about the filler, and additional means arranged toapply a further braking pressure to the spool during a part of eachrotation about its axis.

3. An embroidering machine of the character described including meansfor winding a. binding thread around a filler and automatically varyingthe tensioning of the binding thread at regularly recurring intervalsduring the winding operation, said means comprising a spool from whichthe binding thread is fed, means mounting said spool for turningmovement about its central axis, means for moving said spool in acircular path around the filler, and spool engaging means arranged toapply braking pressure to the spool during a part only of each rotationabout its axis.

4. An embroidering machine as set forth in claim 3, in which the lastmentioned means comprises a flange at one end of said spool, said flangehaving circular peripheral edge which is eccentric to the central axisof rotation of the spool, and a member arranged to engage and exertbraking pressure against the peripheral edge of said flange during apart of each rotation of said flange.

5. An embroidering machine as set forth in claim 3, in which the meansto apply a braking pressure during a part only of each rotation of thespool about its axis comprises aflange at one end of said spool, saidflange having a cir-- cular peripheral edge which is eccentric to thecentral axis of rotation of the spool, and a braking means comprising ablock, and a brake member slidably mounted in said block, said brakemember being adapted to engage the peripheral edge of said flange inbraking engagement during a part of each rotation of said flange.

6. An embroidering machine as set forth in claim 3, in which the meansto apply a braking pressure during a part only of each rotation of thespool about its axis comprises a flange at one end of said spool, saidflange having a circular peripheral edge which is eccentric to thecentral axis of rotation of the spool. and a braking means comprising abrake block, a brake member slidably mounted in said block, said brakemember being adapted to engage the peripheral edge of said flange inbraking engagement during a part of each rotation of said flange, andmeans engageable with said brake member for exerting pressure againstretraction of said brake member during its engagement with said flange.

7. An embroidering machine of the character described including meansfor winding a binding thread. around a filler and automatically varyingthe tensioning of the binding thread at regularly recurring intervalsduring the winding operation, said means comprising a spool from whichthe binding thread is fed, means mounting said spool for turningmovement about its central axis, means for moving said spool in acircular path. around the filler, a flange at one end of said spoolhaving a circular peripheral edge which is eccentric to the central axiof rotation of the spool, and a braking means mounted on said lastmentioned means and arranged to engage and exert braking pressureagainst the peripheral edge of said flange during a part only of eachrotation of said spool about its axis.

8. An embroidering machine as set foith in claim 7, in which saidbraking means comprises a block, and a brake member slidably mounted insaid block and arranged to engage said flange in braking relation.

9. An embroidering machine as set forth in claim 7, in which saidbraking means comprises a block secured to said last mentioned means, a

brake member slidably mounted in said block and arranged to engage saidflange in braking relation, and means engageable with the brake memberfor exerting pressure against retraction of the brake member during itsengagement with the spool flange.

10. An embroidering machine as set forth in claim 7, in which saidbraking means comprises a block secured to said last mentioned means, abrake member slidably mounted in said block and arranged to engage saidflange in braking relation, and a spring member between said brakemember and said block, said spring being adapted to exert a restrainingpressure against retraction of said brake member.

11. An embroidering machine as set forth in claim 7, in which saidbraking means comprises a block secured to said last mentioned means, abrake member slidably mounted in said block and arranged to engage saidflange in braking relation, and a plurality of spring membersresiliently engaging said brake member against retraction during itsengagement with said flange.

12. An embroidering machine of the character described including meansfor winding a binding thread around a filler and automatically varyingthe tensioning of the binding thread at regularly recurring intervalsduring the winding operation, said means comprising a spool from whichthe binding thread is fed, means mounting said spool for turningmovement about its central axis, means for moving said spool in acircular path around the filler, a flange at one end of said spoolhaving a circular peripheral edge which is eccentric to the central axisof rotation of the spool, and a braking means arranged to engage andexert a braking pressure against the peripheral edge of said flangeduring a part only of each rotation of said spool about its axis, saidbraking means comprising a block secured to said last mentioned meansfor moving said spool around said filler, a recess in said block, abrake member slidably mounted in said recess and arranged to engage saidflange in braking relation during the rotation of said spool, a springmember about said brake member in engaging relation between the head ofthe brake member and the side edge of said block,

said spring being adapted to exert a relatively light restrainingpressure against retraction of said brake member, and a second springmember in said recess and engageable against the rear of said brakemember, said second spring member being adapted to exert a relativelystrong restraining pressure against retraction of said brake memberduring its engagement with said flange.

13. An embroidering machine as set forth in claim 12, including anadjustable screw plug in said recess adapted to vary the pressureexerted by said second mentioned spring member upon said brake member.

14. An embroidering machine as set forth in claim 7, in which thebraking means comprises a block secured to the thread winding means, abrake member slidably mounted in said block and arranged to engage thespool flange in braking relation, and a pluralityof spring membersresiliently engaging said brake member against retraction during itsengagement with the spool flange, and in which one of said springmembers is mounted in said block and adapted to engage the rear of thebrake member against retraction during its engagement with the spoolflange, and an adjustable means mounted in the brake block adapted tovary the pressure exerted by said spring upon the rear of the brakemember.

15. An embroidering machine provided with a spool from which a bindingthread is fed, means mounting said spool for rotation on its axis, saidspool having an eccentrically projecting portion, and braking meansengageable with said portion of the spool for applying a brakingpressure thereto during a part of each rotation of the spool about itsaxis.

JACK LOUIS FOGEL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 466,889 Cornely Jan. 12, 18921,375,951 Crozet Apr. 26, 1921 1,081,596 Finch Dec. 16, .1913 1,536,579Groebli May 5, 1925 203,143 Grobli et al Apr, 30, 1878 2,050,790 GoodmanAug. 11, 1936

